LG LAC4710R, Руководство по обслуживанию

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1-1
CONTENTS
SECTION 1 SUMMARY
SERVICING PRECAUTIONS
..........................................................................................................................................1-2
ESD PRECAUTIONS .......................................................................................................................................................1-3
SPECIFICATIONS
.............................................................................................................................................................1-4
SECTION 2 ELECTRICAL
ELECTRICAL TROUBLESHOOTING GUIDE & WAVEFORMS .............................................................................2-1
1. MAIN, FRONT & TUNER PART................................................................................................................................2-1
2. CD PART.....................................................................................................................................................................2-4
• WAVEFORMS ..............................................................................................................................................................2-7
INTERNAL BLOCK DIAGRAM OF ICs ......................................................................................................................2-10
1. IC301 (HA13173AH) ................................................................................................................................................2-10
2. IC302 (BA00CCOWFP)...........................................................................................................................................2-12
3. IC401 (µPD78F1164) ...............................................................................................................................................2-12
4. IC601 (BD3805F) .....................................................................................................................................................2-15
5. IC801 (TB2904HQ) ..................................................................................................................................................2-16
6. IC901 (PT6523) ........................................................................................................................................................2-17
BLOCK DIAGRAM
.........................................................................................................................................................2-19
CIRCUIT DIAGRAMS
.....................................................................................................................................................2-21
1. MAIN CIRCUIT DIAGRAM ......................................................................................................................................2-21
2. CDP CIRCUIT DIAGRAM........................................................................................................................................2-23
3. FRONT CIRCUIT DIAGRAM ..................................................................................................................................2-25
4. AUX CIRCUIT DIAGRAM........................................................................................................................................2-27
5. LCD LIGHTING CIRCUIT DIAGRAM.....................................................................................................................2-28
PRINTED CIRCUIT DIAGRAMS
..................................................................................................................................2-29
1. MAIN P.C.BOARD....................................................................................................................................................2-29
2. CDP P.C.BOARD .....................................................................................................................................................2-33
3. FRONT P.C.BOARD ................................................................................................................................................2-34
4. AUX P.C.BOARD......................................................................................................................................................2-35
5. LCD LIGHTING P.C.BOARD...................................................................................................................................2-35
SECTION 3 EXPLODED VIEWS
1. CABINET AND MAIN FRAME SECTION ................................................................................................................3-1
SECTION 4 REPLACEMENT PARTS LIST
.............................................................4-1
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